diff --git a/book/source/02-highlevel.md b/book/source/02-highlevel.md
index b10504e..d63f4c6 100644
--- a/book/source/02-highlevel.md
+++ b/book/source/02-highlevel.md
@@ -84,9 +84,9 @@ This document describes OpenPGP version 6, while pointing out differences to pre
 
 Significant support for OpenPGP version 6 has already been achieved for multiple implementations, including:
 
+- [Bouncy Castle Java](https://github.com/bcgit/bc-java/issues/1421),
 - [GopenPGP](https://github.com/ProtonMail/gopenpgp/tree/v3),
 - [OpenPGP.js](https://github.com/openpgpjs/openpgpjs/tree/v6),
-- [PGPainless](https://github.com/pgpainless/pgpainless/milestone/6),
 - [PGPy](https://github.com/dkg/PGPy/tree/dkg/crypto-refresh),
 - [Sequoia PGP](https://gitlab.com/sequoia-pgp/sequoia/-/tree/crypto-refresh).